110 results about "Polymer melt" patented technology

The invention discloses a novel textile material with eiderdown wrapped by rainbow yarn nanofibers and a preparation method. The novel textile material comprises skeleton fibers located at the axis, an eiderdown component with a heat preservation effect and a rainbow yarn nanofiber reinforcing layer wrapping the outer surface of the eiderdown component. The wrapping reinforcing layer is of a three-dimensional network structure formed by continuous or quasi-continuous nanofibers in a winding, interweaving and lap joint mode, so that stable compounding and structural shaping of down feather components and skeleton fibers are achieved under the condition that the down feather components and the skeleton fibers do not depend on adhesive fixation. The preparation method comprises the following steps: cleaning, drying and opening down for pretreatment; performing melt differential electrostatic spinning on the polymer melt under a high-voltage electrostatic field to form rainbow yarn nanofibers; the down flocs are introduced into the coating area through the framework fibers, so that the rainbow yarn nanofibers are deposited and wound to form a coating reinforcing layer; after being gathered and shaped and twisted into yarns, the yarns can be continuously dragged and wound. The novel textile material has spinnability, structural stability and long-acting thermal insulation performance, and is suitable for spinning, weaving and knitting processing.

The invention provides a plastic mold intelligent optimization system and method based on digital twinning. The method comprises the steps that a digital twinning model integrating mold cavity geometry and an injection molding machine hydraulic device is established; time sequence data of cavity pressure and screw movement in the filling and pressure maintaining stage are used as input, and PVT characteristic parameters and melt leading edge viscosity attenuation coefficients of the polymer melt in the current production period are identified and updated on line; on the basis of the PVT characteristic parameters and the melt front edge viscosity attenuation coefficient, predicting and generating a dwell pressure curve required for achieving a predefined cavity pressure balance curve in the next period; in the pressure maintaining stage of the next production cycle, the amplitude of the pressure maintaining pressure curve is adjusted according to the dynamic deviation of the cavity pressure detected in real time and the cavity pressure balance curve, a compensation control signal is output to an injection molding machine executing mechanism, and self-adaptive closed-loop adjustment of the cavity pressure is achieved. Based on the above scheme, feedforward optimization based on material characteristics and feedback control of AI disturbance can be realized.

A hot runner injection nozzle system for use in co-injection molding with a built-in obturator valve (7) in a nozzle tip assembly (16) attached to a nozzle body (1) and permits several different directions of gating. It allows for independent flow of each melt stream having their confluence at the very last possible position avoiding mutual contamination with the built-in obturator (7). The nozzle tip assembly comprises several channels providing for the flow of multiple polymeric melt streams and an obturator that serves as a check valve. Selective flow of each stream is fully controlled by individual injection units at the source providing the feed for each melt stream. The invention allows for simple fabrication, maintenance, reduces mutual contamination and allows for a more compact hot runner manifold and tool design. It allows for an optional needle-valve when the product requires a better injection point finish.

This invention discloses an extrusion device for outer protective tubes of buried cables, relating to the field of cable outer protective tube production technology, aiming to solve the problem of easy delamination in traditional double-layer co-extrusion structures. The key technical points are: for producing cable outer protective tubes with reinforced structures, the device includes a first extruder, a second extruder, and a forming die head; the forming die head is located at the discharge port of the first and second extruders. The first extruder provides a first polymer melt to form the tube matrix, and the second extruder forms a second polymer melt with reinforcing material. This invention, through the cooperation of a rotating mandrel and a tangential injection hole, allows the reinforcing melt to dynamically embed into the inner wall of the matrix in a helical trajectory, forming a continuous helical reinforcing rib structure. This structure significantly improves ring stiffness and resistance to external pressure without significantly increasing wall thickness and weight, and because of the one-piece molding, it solves the problem of easy delamination in traditional double-layer co-extrusion structures.

The invention relates to the technical field of hygienic products, in particular to an air-laid glue-free core body for solidifying fluff pulp and SAP (Super Absorbent Polymer) by using superfine melt-blown fibers. The preparation method comprises the following steps: forming fluff pulp fibers into a base material layer through air laying; applying the modified SAP material to the substrate layer; the polymer melt forms melt-blown fibers through a melt-blowing process, and the melt-blown fibers directly deposit and penetrate into the SAP-containing base material layer when the melt-blown fibers have thermal viscosity to form a three-dimensional intertwining structure; and finally, carrying out hot pressing treatment on the structure, and realizing integral solidification under the condition of no additional adhesive by utilizing the thermal viscosity of the melt-blown fibers. The modified SAP material is obtained through pretreatment of an epoxy compound and coating treatment of mixed slurry of nanocrystalline cellulose and a functional additive. The problems that SAP particles in a traditional core body are prone to migration, powder falling and gel blocking are effectively solved through the glue-free solidification technology, and the obtained core body is high in absorption speed, low in back seepage amount, stable in structure and suitable for sanitary products such as paper diapers and sanitary napkins.

This invention relates to the field of polymer foaming materials technology, and discloses a plant fiber composite nucleating agent for microfoaming of biodegradable materials and its application. The plant fiber composite nucleating agent is made from raw materials comprising the following parts by weight: 80-95 parts of primary ultrafine plant fiber powder, 5-20 parts of surface modifier, and 0.1-5 parts of dispersing lubricating wax; the surface modifier and dispersing lubricating wax are coated on the surface of the primary ultrafine plant fiber powder. The application steps are as follows: adding the plant fiber composite nucleating agent to a biodegradable material matrix to obtain a pre-foaming blend, introducing foaming gas or adding a chemical foaming agent for foaming treatment. The nucleating agent of this invention improves the compatibility between plant fibers and hydrophobic biodegradable matrices, provides heterogeneous nucleation sites in the matrix while increasing the polymer melt strength, inhibits cell coalescence and rupture, and obtains microfoamed materials with uniform pore size. Furthermore, the nucleating agent itself is completely biodegradable.

The application discloses a kind of continuous fiber's ratchet roller filament spreading-press roller impregnation device, it successively includes carbon fiber yarn roll for winding fiber;Ratchet roller filament spreading-press roller impregnation device, including shell, upper portion in shell is for molten polymer melt pool, lower portion is for impregnating fiber impregnation pool, shell is set with respectively silk inlet, silk outlet relative to the two sides of impregnation pool, impregnation pool is equipped with for the ratchet roller filament spreading assembly of fiber and is used for the press roller impregnation component of fiber and is impregnated;For cooling fiber water cooling pool;For collecting fiber winding roller.The application increases the contact area of continuous fiber tows and polymer melt, can make melt more easily combined with continuous fiber in short time, reduces fiber impregnation porosity, guarantees the impregnation of forming fiber prepreg sufficient uniform, solves the problem that fiber prepreg impregnation time is short, impregnation is not sufficient, and the porosity of prepreg is high.

Rheometry systems for use with systems including pressurized polymer melt and / or other viscous materials are described. In one embodiment, a rheometer is connected to an associated system having a bent, curved, or bendable tube to allow the rheometer to measure rheological properties at a location that would otherwise be inaccessible to position the rheometer there due to the presence of an obstruction. Embodiments including rigid straight tubes for connecting the rheometer to the associated system are also described. In another embodiment, a flow-through rheometer is connected to an industry standard 1 / 2-20 thermowell orifice, which is commonly used to attach temperature and pressure probes to vessels containing viscous materials, such as extruders or injection molding systems.

A method for forming a monolith of carbon molecular sieves includes loading a resin into an extruder; heating the resin to form a polymer melt; introducing the polymer melt into a microcapillary film die to form microcapillaries in the polymer melt; quenching the polymer melt to form a microcapillary film; generating a microcapillary film layer; laminating the layers or placing the microcapillary film layers into a mold; heating the microcapillary film layers to a temperature of 50 DEG C to 350 DEG C to form a polymer monolith; pyrolyzing the polymer monolith by heating the polymer monolith to a temperature of 500 DEG C to 1700 DEG C to form the carbon molecular sieve monolith; and activating the carbon molecular sieve monolith using one or more oxidizing agents.

The invention discloses a method for measuring a non-Newtonian index of a polymer melt. The method comprises the following steps: inputting the polymer melt to be measured into a capillary channel; driving the polymer melt to enable the polymer melt to flow in the capillary channel; collecting the driving pressure and the driving rate of the polymer melt; a non-Newtonian index of the polymer melt is calculated based on the drive pressure and the drive rate. According to the non-Newtonian index measurement method and device of the polymer melt, the computer equipment and the storage medium, calculation can be carried out only by adopting the original driving pressure and driving rate, and the calculation process can be greatly simplified.

This invention discloses a devolatilization process for high melt flow index and high transparency lithium-based polymer solutions. The process employs falling film evaporation for initial evaporation, followed by deep devolatilization using a twin-screw extruder, with the volatile solvent being condensed and recovered. The devolatilized polymer melt is then extruded by a screw extruder, pelletized by an underwater pelletizer, and dehydrated by a centrifugal dewatering machine to obtain finished polymer granules. This method can be used for the devolatilization of high melt flow index, high transparency, and low water content lithium-based polymer solutions, and the resulting polymer volatile content is ≤0.5% (mass fraction). The granules or cobblestone-like particles are easy for downstream processing applications. This process is simple, low-cost, can be manufactured using existing mature equipment and processes, and is easy to control and industrialize.

This invention provides a continuous, dynamic, and efficient defloration method for polymer / volatile component systems based on high mass transfer interfaces. [Solution] The method includes the steps of adding a polymer solution to a single-screw dynamic defoliation apparatus, wherein the polymer solution contains a defoliated polymer and volatile small molecule substances, the volatile small molecule substances containing an organic solvent, residual monomer, water, or reaction by-products, and after the material in the defoliation section is defoliated, it is conveyed and compressed by a screw and then removed from the single-screw dynamic defoliation apparatus, or providing a side-feed extruder downstream of the defoliation section, adding a plastic additive to the defoliated polymer molten body, melting and mixing it with the defoliated polymer molten body at the end of the single-screw dynamic defoliation apparatus, and then removing it from the dynamic defoliation apparatus.

The invention relates to the technical field of industrial automation and process control, and discloses an anesthesia closed type sputum suction tube body extrusion shaping Internet of Things control system, which comprises a melt state online sensing module, a high polymer melt state online sensing module, a high polymer melt state online sensing module, a high polymer melt state online sensing module and a high polymer melt state online sensing module, and the high polymer melt state online sensing module is used for acquiring rheological state information of high polymer melt in real time to provide basis for control decision; the cooperative control execution module is used for executing feed-forward control based on the melt state information so as to instantaneously suppress the roughness of the inner wall of the pipe body, performing decoupling compensation control so as to eliminate the disturbance to the size of the pipe body, and combining size feedback correction to finally synthesize a cooperative control instruction for driving a plurality of actuators; and the Internet of Things monitoring and management platform communicates with the cooperative control execution module and is used for intensively receiving and storing high-frequency control data and process parameters in the production process so as to realize remote monitoring and quality tracing. According to the invention, through cooperative control of melt sensing, feedforward and decoupling, the roughness of the inner wall is instantaneously inhibited, the outer diameter is stabilized, and self-optimization is realized through the Internet of Things.

The invention relates to a method for purifying a thermoplastic material (22), such as polyethylene terephthalate (PET), comprising the steps of: - supplying pellets or shreds of the thermoplastic material into a melt processing device (20); and - melting the thermoplastic material to form a polymer melt; wherein the method further comprises a step of: - adding a pro-degradant into the pellets or shreds of the thermoplastic material, and / or into the polymer melt, to selectively degrade at least polyvinyl chloride (PVC) and benzene impurities, and / or any intermediate degradation product formed by or leading to the formation of such impurities, contained within said thermoplastic material and / or said polymer melt.

The present invention relates to a polyethylene composition comprising polyethylene having excellent balance between processability and mechanical property. Said polyethylene composition has significantly improved polymer melt strength and also shows good shear sensitivity behavior while also providing improved mechanical property. These are the results of the polymer which is characterized in the molecular weight distribution and the short chain branching distribution, as shown in this present invention, due to synergistic behavior of the dual catalyst system in which said polyethylene can be prepared using single polymerization reactor.

The invention discloses a preparation method of a high-flexibility nylon ester film. The preparation method comprises the following steps: S1, preparing a nylon oligomer; s2, preparing a PTMEG (polytetramethylene ether glycol) prepolymer; s3, mixing the nylon oligomer in the step S1 and the PTMEG prepolymer in the step S2 with a cross-linking agent and a catalyst, and stirring to enable the mixture to react to form a homogeneous polymer melt; and S4, casting the polymer melt into a film through a casting machine, and cooling to obtain the nylon ester film after stretching, sizing and annealing treatment. The invention also discloses a nylon ester film. According to the invention, the PA1010 oligomer is subjected to grafting reaction with the isocyanate group of the PTMEG prepolymer and the cross-linking agent through the active end group, so that a nylon ester block structure is really formed, a firm covalent bond is formed, and the problem of interfacial compatibility is fundamentally solved. Meanwhile, a three-dimensional network structure is formed through the cross-linking agent, the molecular-level combination effect of soft-hard segments is achieved, and therefore the defect that the hard segments and the soft segments are separated on the macroscopic or microcosmic scale is overcome.

The present invention relates to a polyethylene composition comprising polyethylene having an excellent balance between processability and mechanical properties. The polyethylene composition has significantly improved polymer melt strength and also exhibits good shear sensitive behavior while also providing improved mechanical properties. As shown in the present invention, due to the synergistic behavior of the dual catalyst system, in which a single polymerization reactor can be used to prepare the polyethylene, as a result of polymers characterized by molecular weight distribution and short chain branching distribution.

Methods, apparatuses, systems, and techniques relate to a tube-forming device for an extruder unit or an extrusion device and a tube-forming process. The tube-forming device comprises at least one shaping sleeve, which is designed to shape a supplied stream of polymer melt from a substantially strand-like cross section into a tubular cross section. The shaping sleeve has a guiding passage embedded in the sleeve wall, such that the guiding passage is a cavity which lies within the sleeve wall and, in the radial direction of the shaping sleeve, is enclosed in a sealed manner with respect to the outer surfaces.

The present invention relates to a casting device 14 and a system 10 for producing a film. The casting device comprises a cooling roller 142, a take-off roller 144, and a water bath 150. The cooling roller 142 is configured to cool a polymer melt extruded onto its surface in order to produce a film F. The take-off roller 144 is located downstream of the cooling roller 142 and is configured to detach the film F from the cooling roller 142. The cooling roller is at least partially submerged in the water bath 150, such that the detachment point P of the film from the cooling roller 142 is above the water level of the water bath. The cooling roller has a roller width B. K and the take-off roller has a roller width B T on, whereby the roller width B T the take-off roller 144 is smaller than the roller width B K the cooling roller 142.

This invention discloses an online quality control method and system based on the rheological properties of raw polymers. Real-time flow information from different sections of the raw polymer melt processing line is acquired and converted into one or more rheological property curves at different times. These rheological property curves at different times are then filtered using feature engineering methods to obtain correlated rheological property curves. These correlated rheological property curves are input into a polymer property calculation device to obtain the predicted product quality value for the current time period. It is then determined whether the predicted product quality value falls within a threshold range. If it does, the current flow information of the raw polymer processing line is considered to meet the requirements; otherwise, it does not meet the requirements and adjustments to the current flow information are necessary. This invention employs online rheological detection technology combined with AI algorithms, resulting in improved efficiency and accuracy of online quality control technology.

The invention belongs to the technical field of chemical fiber manufacturing, and particularly discloses a preparation method of orange petal type composite fibers and a spinneret plate assembly. The spinneret plate assembly comprises a first distribution plate, a second distribution plate, a third distribution plate and a spinneret plate which are sequentially overlapped, a boss is arranged on the lower surface of the third distribution plate, and small through holes and small grooves which are alternately arranged at intervals and communicated with two melt runners respectively are formed in the boss. During preparation, two polymer melts are distributed step by step through the distribution plates, are pre-arranged into a spaced and parallel form through the boss structures, then are compositely extruded in the spinneret orifices, and are cooled and cured to obtain the orange petal type composite fiber. According to the invention, the melt pre-arrangement structure is arranged at the upstream of the final composite point, so that the accurate control on the form of the two-component interface is realized, the orange petal type fiber with a regular section and a clear interface can be stably spun, and a foundation is laid for the subsequent efficient and uniform production of high-quality superfine fiber.

A discharge device is for a filtering device for separating impurities from a material melt, in particular a low-viscosity polymer melt. The discharge device includes a discharge shaft with a pressure screw conveyor and a discharge head. Also disclosed is a filtering device including a cylindrical drum filter, a scraper and such a discharge device.

The invention belongs to the technical field of energy materials, and particularly relates to a reversible thermal shutdown diaphragm and application. According to the invention, the reversible thermal shutdown diaphragm structure is designed by utilizing the temperature dependence of the rheological behavior of a polymer melt; the reversible thermal shut-off diaphragm is of a three-layer composite structure formed by sequentially stacking a moist-resistant layer, a middle shut-off layer and a moist-friendly layer. The reversible thermal shut-off diaphragm can realize a reversible thermal response function near a polymer melting point of a middle shut-off layer, that is, an ion channel is reversibly closed and recovered in a specific temperature interval, so that thermal runaway is effectively prevented, and the reversible thermal shut-off diaphragm has excellent reversible recovery characteristic. The reversible thermal turn-off diaphragm realizes reversible opening and closing of a pore structure in a specific temperature window by accurately controlling the spatial distribution behavior of a polymer melt in a solid-liquid phase change interval, has rapid reversible thermal turn-off capability, and is suitable for a safety protection system of a high-specific-energy power battery.

The invention discloses a color master batch dispersibility detection method based on a rheology principle. The method comprises the following steps: S1, preparing a polymer melt test sample containing a color master batch to be detected and a standard sample with good dispersibility; s2, using a capillary rheometer to obtain the total pressure drop when the sample flows through the capillary; s3, determining inlet pressure drop of the to-be-detected sample and the standard sample; s4, on the basis of the difference between the inlet pressure drop of the to-be-tested sample and the inlet pressure drop of the standard sample, calculating a dispersity index for quantitatively evaluating the dispersion degree of the to-be-tested color master batch. According to the invention, the color master batch dispersibility is improved from qualitative description to quantitative evaluation, and the reproducibility, comparability and high sensitivity of the detection method are ensured.

Reactor unit for plastic thermolysis, comprising - a melting reactor (1) for melting plastic waste (4) introduced into the melting reactor (1) and for receiving the plastic melt (5) formed from the plastic waste (4), - a pre-evaporator (2) for receiving and partially evaporating a pre-evaporator liquid (7), as well as - a post-evaporator (3) for receiving and residual evaporation of a post-evaporator liquid (8), wherein - the melting reactor (1) has a melting agitator (13) driven by a melting agitator drive (12) for circulating and mixing the polymer melt (5), - the melting reactor (1) is connected to the pre-evaporator (2) via a pre-evaporator supply line (20), through which the pre-evaporator liquid (7) forming in the melting reactor (1) in the area of ​​the liquid level of the plastic melt (5) passes into the pre-evaporator (2), - the pre-evaporator (2) is connected to the post-evaporator (3) via a post-evaporator supply line (21), through which the post-evaporator liquid (7) forming in the pre-evaporator (2) in the region of the liquid level of the pre-evaporator liquid (7) passes into the post-evaporator (2), and - the pre-evaporator (2) has a pre-evaporator exhaust (28) and the post-evaporator (3) has a post-evaporator exhaust (29) through which gases and / or vapors (9) generated in the melting reactor (1), in the pre-evaporator (2) or in the post-evaporator (3) can be discharged from the reactor unit as valuable materials, characterized in that the reactor unit further comprises: - a viscometer for determining the viscosity of the polymer melt (5) in the melting reactor (1), a controllable recirculation pump (15) and a controller (14) coupled to the viscometer and the recirculation pump (15) via signal lines (16), wherein the controller (14) is configured to control the delivery rate of the recirculation pump (15) as a function of the viscosity of the polymer melt (5), by means of the recirculation pump (15) controlled by the controller (14) to discharge a predetermined quantity of the pre-evaporator liquid (7) from the pre-evaporator sump (30) of the pre-evaporator (2) and / or the post-evaporator liquid (8) from the post-evaporator sump (31) of the post-evaporator (3) and introduce it into the polymer melt (5) in the melting reactor (1) as soon as the measured viscosity of the polymer melt (5) exceeds a predetermined maximum viscosity; - a return line (38) connected to the return feed pump (15), wherein the return line (38) is connected to the pre-evaporator (2) for the discharge of pre-evaporator liquid (7) from the pre-evaporator sump (30) of the pre-evaporator (2) and / or to the post-evaporator (3) for the discharge of post-evaporator liquid (8) from the post-evaporator sump (31) of the post-evaporator (3); - a return feed line (39) connected to the return feed pump (15) and extending into the melting reactor (1) for the quantity-controlled introduction of the pre-evaporator liquid (7) and / or post-evaporator liquid (8) conveyed via the return line (38) to the return feed pump (15) from an outlet opening of the return feed line (39) into the plastic melt (5).

The invention relates to a method for manufacturing a space-optimized fluid line for a motor vehicle, comprising the following process steps. In a first process step, an extruded profile is provided, wherein the extruded profile comprises at least one chamber. In a second process step, a polymer melt is injected into at least one chamber of the extruded profile. In a third process step, water is injected into the at least one chamber into which the polymer melt has been injected to create a cavity from a first end of the extruded profile to a second end of the extruded profile. In a fourth process step, the injected polymer melt is cooled by the injected water for a predetermined period of time. In a fifth process step, the injected water is drained from the cavity.

The invention discloses a polymer mixing or devolatilization device and a mixing and devolatilization method, and the mixing and devolatilization method comprises the following steps: dispersing an additive fluid into micro / small liquid drops or micro / small bubbles, injecting the micro / small liquid drops or micro / small bubbles into a polymer melt in a high-frequency and intermittent manner, and mixing the micro / small liquid drops or micro / small bubbles with the polymer melt; then controlling reaction conditions to change to remove volatile components; the mixing or devolatilization device comprises a shell, and a plurality of additive injection ports are formed in the shell; the additive distributor is communicated with the additive injection ports; the pulse flow generator is connected with the additive distributor; an additive sequentially passes through the pulse flow generator, the additive distributor and the additive injection port and is jetted into the shell in a high-frequency and intermittent mode. The method provided by the invention can promote the small molecular substances to diffuse into the bubbles / liquid drops, so that the volatilizable small molecular substances are rapidly removed, the polymer melt suitable for direct spinning or other subsequent processing is obtained, the process flow can be shortened, the energy consumption is reduced, and the investment is saved.

Hot runner distribution system for polymer melts for filling mold cavities, wherein several hot tube elements are connected together and these are wrapped and heated with only one insulated heating wire or tubular heating element.

The invention provides a preparation method for coating molding of a barb suture line, and relates to the field of surgery and medical cosmetology, and the preparation method comprises the following steps: S1, conveying the suture line to pass through a mold cavity of an injection mold, and injecting a low-melting-point polymer melt at a predetermined coating position to form a coating piece of a barb structure; s2, the injection mold is kept in a closed state, a cooling medium is introduced into the cooling channel, and first-stage cooling is conducted on the wrapping part; s3, after the injection mold is opened and the suture line carrying the wrapping piece is separated from the mold cavity, the barb suture line is obtained, then the barb suture line is guided into a cooling area outside the mold, and second-stage cooling is conducted; and S4, after cooling judgment is carried out through a temperature detection device, the barb suture line is wound and collected in the clean chamber. Through local heat management, staged progressive cooling, cooling completion judgment and closed clean environment winding, the quality consistency of the coating piece and the mechanical property stability of the sewing thread are considered under the continuous production condition.

A method for processing a polyolefin recyclate comprises adding the polyolefin recyclate to a reaction zone and implementing visbreaking conditions in the reaction zone to produce a treated polymer melt. The visbreaking conditions comprise adding specific energy to the polyolefin recyclate sufficient to initiate visbreaking but insufficient to initiate degradation of the polyolefin recyclate and reducing pressure on at least a portion of the reaction zone to less than atmospheric pressure to produce a treated polymer melt and an off-gas byproduct stream. The polyolefin recyclate has a first melt index (MI1), the treated polymer melt has a second melt index (MI2), and MI2 / MI1 is greater than or equal to 3.